| Solution | Length | |
|---|---|---|
| 2 letters | ||
| AE | 2 | |
| 4 letters | ||
| UPON | 4 | |
| urdu | 4 | |
| inon | 4 | |
| ware | 4 | |
| 5 letters | ||
| Up On | 5 | |
| close | 5 | |
| 6 letters | ||
| expert | 6 | |
| versed | 6 | |
| primed | 6 | |
| 7 letters | ||
| used to | 7 | |
| trained | 7 | |
| skilled | 7 | |
| learned | 7 | |
| 8 letters | ||
| quainted | 8 | |
| sentient | 8 | |
| prepared | 8 | |
| familiar | 8 | |
| 9 letters | ||
| well-read | 9 | |
| versed-in | 9 | |
| strong-in | 9 | |
| technical | 9 | |
| versatile | 9 | |
| household | 9 | |
| 10 letters | ||
| PROFICIENT | 10 | |
| scholastic | 10 | |
| 11 letters | ||
| EXPERIENCED | 11 | |
| 12 letters | ||
| professional | 12 | |